PowerShell Requires Chilkat v11.7.0+

Remove the Password and Encryption from a PDF

See more PDF Protection Examples

Demonstrates the removeEncryption operation, which saves the PDF with no encryption at all: no password, no restrictions. It needs owner rights, so the PDF is loaded with its owner password. As with every Protection operation, the change is applied when the file is written. PowerShell

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

#  This example requires the Chilkat API to have been previously unlocked.
#  See Global Unlock Sample for sample code.

#  The PDF used in this example is available at encrypted_user_password.pdf

$pdf = New-Object Chilkat.Pdf

#  Removing the encryption needs owner rights: load with the owner password.
$pdf.OwnerPassword = "owner-secret"
$success = $pdf.LoadFile("qa_data/pdf/encrypted_user_password.pdf")
if ($success -eq $false) {
    $($pdf.LastErrorText)
    exit
}

$json = New-Object Chilkat.JsonObject
$jsonOut = New-Object Chilkat.JsonObject
$success = $pdf.Protection("getInfo",$json,$jsonOut)
if ($success -eq $false) {
    $($pdf.LastErrorText)
    exit
}

$("encrypted, as loaded: " + $jsonOut.BoolOf("loaded.encrypted"))
$("algorithm: " + $jsonOut.StringOf("loaded.algorithm"))

$success = $pdf.Protection("removeEncryption",$json,$jsonOut)
if ($success -eq $false) {
    $($pdf.LastErrorText)
    exit
}

$("will be saved encrypted: " + $jsonOut.BoolOf("pending.encrypted"))

$success = $pdf.WriteFile("qa_output/minutes_unprotected.pdf")
if ($success -eq $false) {
    $($pdf.LastErrorText)
    exit
}

#  The result is an ordinary PDF that opens without a password.
$reader = New-Object Chilkat.Pdf
$info = New-Object Chilkat.JsonObject
$success = $reader.PreLoadCheck("qa_output/minutes_unprotected.pdf",$info)
if ($success -eq $false) {
    $($reader.LastErrorText)
    exit
}

$("encrypted: " + $info.BoolOf("encrypted"))
$success = $reader.LoadFile("qa_output/minutes_unprotected.pdf")
if ($success -eq $false) {
    $($reader.LastErrorText)
    exit
}

$("pages: " + $reader.NumPages)

#  Sample output:

#  encrypted, as loaded: True
#  algorithm: rc4-128
#  will be saved encrypted: False
#  encrypted: False
#  pages: 1